Error at trade

[SkyDragon]

I have an error

• -- expert inventar
  INV_MAX_SLOTS = 60, -- maximal slots to update in the inventory:update()
  INV_UPDATE_INTERVAL = 300, -- full inventory update every x seconds (only used indirect atm)
  INV_AUTOSELL_ENABLE = true, -- autosell items at merchant true|false
  INV_AUTOSELL_FROMSLOT = 1, -- autosell from slot #
  INV_AUTOSELL_TOSLOT = 30, -- autosell to slot #
  INV_AUTOSELL_QUALITY = "white", -- itemcolors to sell
  INV_AUTOSELL_IGNORE = nil, -- itemnames never so sell
  INV_AUTOSELL_NOSELL_DURA = 0, -- durability > x will not sell, 0=sell all
  INV_AUTOSELL_STATS_NOSELL = nil, -- stats (text search at right tooltip side) that will not be selled
  INV_AUTOSELL_STATS_SELL = nil, -- stats (text search at right tooltip side) that will be selled, even if in nosell

I badly speak on English